This webpage was created to accompany the submission of the paper
A Lightweight Functional Embedding of Attribute Grammars.
Here you can get the complete code (compiled under GHC 6.10.4) of
all the examples presented in the paper and the entire
implementation of the generic zipper library that is used throughout
the paper.
1. Introduction
In the introduction we review the
repmin problem, and we
present three different solutions for it (
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2. Huet's Standard Zipper
In this section of the paper, we present the zipper data structure
that allows us to navigate on binary leaf trees, and we use such
mechanism to navigate on a concrete tree (
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3. The repmin First Class Attribute Grammar
In the paper, we start by showing how the zipper data structure
defined in
section 2 (
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used to implement an attribute grammar for solving the
repmin problem (
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on how function memoization can improve our implementation. The
memoization primitive that we mention in the paper is implemented in
a small library (
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Source).
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4. The Generic Zipper
We then describe the use of a generalized form of the standard
zipper data structure introduced in
section
2. The code of the example that we use for this purpose, in the
paper, can be obtained here (
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library that is introduced in
section 6 (
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5. The Algol 68 Scope Rules
The generic zipper framework described in the previous section (
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used here to implement an attribute grammar for a more realistic
programming problem: we implement a semantic analyzer for the Algol
68 scope rules (
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Source).
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6. A Library for Generic Zippers
Finally, we describe the implementation of the generic zipper, and
make it available as a library (
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mention in the paper can be found here (
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A zip file containing all the modules presented in this page can be downloaded
here.
